Geografic-Information-System/gui/wxpython/vdigit/mapwindow.py

"""!
@package vdigit.mapwindow

@brief Map display canvas for wxGUI vector digitizer

Classes:
 - mapwindow::VDigitWindow

(C) 2011 by the GRASS Development Team

This program is free software under the GNU General Public License
(>=v2). Read the file COPYING that comes with GRASS for details.

@author Martin Landa <landa.martin gmail.com>
"""

import wx
import tempfile

from dbmgr.dialogs  import DisplayAttributesDialog
from core.gcmd      import RunCommand, GMessage, GError
from core.debug     import Debug
from mapdisp.mapwindow import BufferedWindow
from core.settings  import UserSettings
from core.utils     import ListOfCatsToRange
from core.globalvar import QUERYLAYER
from vdigit.dialogs import VDigitCategoryDialog, VDigitZBulkDialog, VDigitDuplicatesDialog
from gui_core       import gselect

class VDigitWindow(BufferedWindow):
    """!A Buffered window extended for vector digitizer.
    """
    def __init__(self, parent, giface, Map, frame,
                 id = wx.ID_ANY, tree = None, lmgr = None,
                 style = wx.NO_FULL_REPAINT_ON_RESIZE, **kwargs):
        BufferedWindow.__init__(self, parent = parent, giface = giface, id = id, Map = Map,
                                frame = frame, tree = tree, style = style, **kwargs)
        self.lmgr = lmgr
        self.pdcVector = wx.PseudoDC()
        self.toolbar   = self.parent.GetToolbar('vdigit')
        self.digit     = None # wxvdigit.IVDigit
        
        self.Bind(wx.EVT_KEY_DOWN, self.OnKeyDown)
        
    def GetDisplay(self):
        if self.digit:
            return self.digit.GetDisplay()
        return None

    def SetToolbar(self, toolbar):
        """!Set up related toolbar
        """
        self.toolbar = toolbar
        
    def _onMotion(self, coord, precision):
        """!Track mouse motion and update statusbar (see self.Motion)

        @parem coord easting, northing
        @param precision formatting precision
        """
        e, n = coord
        
        if self.toolbar.GetAction() != 'addLine' or \
                self.toolbar.GetAction('type') not in ('line', 'boundary') or \
                len(self.polycoords) == 0:
            return False
        
        # for linear feature show segment and total length
        distance_seg = self.Distance(self.polycoords[-1],
                                     (e, n), screen = False)[0]
        distance_tot = distance_seg
        for idx in range(1, len(self.polycoords)):
            distance_tot += self.Distance(self.polycoords[idx-1],
                                          self.polycoords[idx],
                                          screen = False)[0]
        self.parent.SetStatusText("%.*f, %.*f (seg: %.*f; tot: %.*f)" % \
                                                (precision, e, precision, n,
                                                 precision, distance_seg,
                                                 precision, distance_tot), 0)
        
        return True
    
    def OnKeyDown(self, event):
        """!Key pressed"""
        shift = event.ShiftDown()
        kc = event.GetKeyCode()
        
        event = None
        if not shift:
            if kc == ord('P'):
                event = wx.CommandEvent(winid = self.toolbar.addPoint)
                tool = self.toolbar.OnAddPoint
            elif kc == ord('L'):
                event = wx.CommandEvent(winid = self.toolbar.addLine)
                tool = self.toolbar.OnAddLine
        if event:
            self.toolbar.OnTool(event)
            tool(event)
        
    def _updateMap(self):
        if not self.toolbar or \
                not self.toolbar.GetLayer():
            return
        
        # set region
        self.digit.GetDisplay().UpdateRegion()
        # re-calculate threshold for digitization tool
        # self.parent.digit.GetDisplay().GetThreshold()
        # draw map
        # self.pdcVector.Clear()
        self.pdcVector.RemoveAll()
        
        item = None
        if self.tree:
            try:
                item = self.tree.FindItemByData('maplayer', self.toolbar.GetLayer())
            except TypeError:
                pass
        
        if not self.tree or \
                (self.tree and item and \
                     self.tree.IsItemChecked(item)):
            self.redrawAll = True
            self.digit.GetDisplay().DrawMap()
        
        # translate tmp objects (pointer position)
        if self.toolbar.GetAction() == 'moveLine' and \
                hasattr(self, "moveInfo"):
            if 'beginDiff' in self.moveInfo:
                # move line
                for id in self.moveInfo['id']:
                    self.pdcTmp.TranslateId(id,
                                            self.moveInfo['beginDiff'][0],
                                            self.moveInfo['beginDiff'][1])
                del self.moveInfo['beginDiff']
        
    def OnLeftDownAddLine(self, event):
        """!Left mouse button pressed - add new feature
        """
        try:
            mapLayer = self.toolbar.GetLayer().GetName()
        except:
            return
        
        if self.toolbar.GetAction('type') in ['point', 'centroid']:
            # add new point / centroiud
            east, north = self.Pixel2Cell(self.mouse['begin'])
            nfeat, fids = self.digit.AddFeature(self.toolbar.GetAction('type'), [(east, north)])
            if nfeat < 1:
                return
            
            self.UpdateMap(render = False) # redraw map
            
            # add new record into atribute table
            if UserSettings.Get(group = 'vdigit', key = "addRecord", subkey = 'enabled'):
                # select attributes based on layer and category
                cats = { fids[0] : {
                        UserSettings.Get(group = 'vdigit', key = "layer", subkey = 'value') :
                            (UserSettings.Get(group = 'vdigit', key = "category", subkey = 'value'), )
                        }}
                
                posWindow = self.ClientToScreen((self.mouse['end'][0] + self.dialogOffset,
                                                 self.mouse['end'][1] + self.dialogOffset))
                
                addRecordDlg = DisplayAttributesDialog(parent = self, map = mapLayer,
                                                       cats = cats,
                                                       pos = posWindow,
                                                       action = "add", ignoreError = True)
                
                if self.toolbar.GetAction('type') == 'centroid':
                    for fid in fids:
                        self._geomAttrb(fid, addRecordDlg, 'area')
                        self._geomAttrb(fid, addRecordDlg, 'perimeter')
                
                if addRecordDlg.IsFound() and \
                        addRecordDlg.ShowModal() == wx.ID_OK:
                    sqlfile = tempfile.NamedTemporaryFile(mode = "w")
                    for sql in addRecordDlg.GetSQLString():
                        sqlfile.file.write(sql + ";\n")
                    sqlfile.file.flush()
                    
                    RunCommand('db.execute',
                               parent = self,
                               quiet = True, 
                               input = sqlfile.name)
                
                if addRecordDlg.mapDBInfo:
                    self._updateATM()
        
        elif self.toolbar.GetAction('type') in ["line", "boundary", "area"]:
            # add new point to the line
            self.polycoords.append(self.Pixel2Cell(event.GetPositionTuple()[:]))
            self.DrawLines(pdc = self.pdcTmp)
        
    def _geomAttrb(self, fid, dialog, attrb):
        """!Define geometry attributes
        """
        mapLayer = self.toolbar.GetLayer()
        if self.tree:
            item = self.tree.FindItemByData('maplayer', mapLayer)
            vdigit = self.tree.GetLayerInfo(item, key = 'vdigit')
        else:
            item = vdigit = None
        
        if not vdigit or \
                'geomAttr' not in vdigit or \
                attrb not in vdigit['geomAttr']:
            return
        
        val = -1
        if attrb == 'length':
            val = self.digit.GetLineLength(fid)
            type = attrb
        elif attrb == 'area':
            val = self.digit.GetAreaSize(fid)
            type = attrb
        elif attrb == 'perimeter':
            val = self.digit.GetAreaPerimeter(fid)
            type = 'length'
        
        if val > 0:
            layer = int(UserSettings.Get(group = 'vdigit', key = "layer", subkey = 'value'))
            column = vdigit['geomAttr'][attrb]['column']
            val = UnitsConvertValue(val, type, vdigit['geomAttr'][attrb]['units'])
            dialog.SetColumnValue(layer, column, val)
            dialog.OnReset()
        
    def _geomAttrbUpdate(self, fids):
        """!Update geometry atrributes of currently selected features
        
        @param fid list feature id
        """
        mapLayer = self.parent.toolbars['vdigit'].GetLayer()
        vectorName =  mapLayer.GetName()
        if self.tree:
            item = self.tree.FindItemByData('maplayer', mapLayer)
            vdigit = self.tree.GetLayerInfo(item, key = 'vdigit')
        else:
            item = vdigit = None
        
        if not vdigit or 'geomAttr' not in vdigit:
            return
        
        dbInfo = gselect.VectorDBInfo(vectorName)
        sqlfile = tempfile.NamedTemporaryFile(mode = "w")
        for fid in fids:
            for layer, cats in self.digit.GetLineCats(fid).iteritems():
                table = dbInfo.GetTable(layer)
                for attrb, item in vdigit['geomAttr'].iteritems():
                    val = -1
                    if attrb == 'length':
                        val = self.digit.GetLineLength(fid)
                        type = attrb
                    elif attrb == 'area':
                        val = self.digit.GetAreaSize(fid)
                        type = attrb
                    elif attrb == 'perimeter':
                        val = self.digit.GetAreaPerimeter(fid)
                        type = 'length'
                    
                    if val < 0:
                        continue
                    val = UnitsConvertValue(val, type, item['units'])
                    
                    for cat in cats:
                        sqlfile.write('UPDATE %s SET %s = %f WHERE %s = %d;\n' % \
                                          (table, item['column'], val,
                                           dbInfo.GetKeyColumn(layer), cat))
            
            sqlfile.file.flush()
            RunCommand('db.execute',
                       parent = True,
                       quiet = True,
                       input = sqlfile.name)
            
    def _updateATM(self):
        """!Update open Attribute Table Manager
        
        @todo: use AddDataRow() instead
        """
        if not self.lmgr:
            return
        
        # update ATM
        digitVector = self.toolbar.GetLayer().GetName()
                            
        for atm in self.lmgr.dialogs['atm']:
            atmVector = atm.GetVectorName()
            if atmVector == digitVector:
                layer = UserSettings.Get(group = 'vdigit', key = "layer", subkey = 'value')
                # TODO: use AddDataRow instead
                atm.LoadData(layer)
        
    def OnLeftDownEditLine(self, event):
        """!Left mouse button pressed - edit linear feature - add new
        vertex.
        """
        self.polycoords.append(self.Pixel2Cell(self.mouse['begin']))
        self.moveInfo['id'].append(wx.NewId())
        self.DrawLines(pdc = self.pdcTmp)
        
    def OnLeftDownMoveLine(self, event):
        """!Left mouse button pressed - vector digitizer move
        feature/vertex, edit linear feature
        """
        self.moveInfo = dict()
        # geographic coordinates of initial position (left-down)
        self.moveInfo['begin'] = None
        # list of ids to modify    
        self.moveInfo['id'] = list()
        
        # set pen
        if self.toolbar.GetAction() in ["moveVertex", "editLine"]:
            pcolor = UserSettings.Get(group = 'vdigit', key = "symbol",
                                      subkey = ["highlight", "color"])
            self.pen = self.polypen = wx.Pen(colour = pcolor,
                                             width = 2, style = wx.SHORT_DASH)
            self.pdcTmp.SetPen(self.polypen)
        
    def OnLeftDownDisplayCA(self, event):
        """!Left mouse button pressed - vector digitizer display categories
        or attributes action
        """
        try:
            mapLayer = self.toolbar.GetLayer().GetName()
        except:
            return
        
        coords = self.Pixel2Cell(self.mouse['begin'])
        
        # unselect
        self.digit.GetDisplay().SetSelected([])
        
        # select feature by point
        cats = {}
        self.digit.GetDisplay().SelectLineByPoint(coords) 
        
        if not self.digit.GetDisplay().GetSelected():
            for key in ('attributes', 'category'):
                if self.parent.dialogs[key] and \
                        self.parent.dialogs[key].IsShown():
                    self.parent.dialogs[key].Hide()
            self.UpdateMap(render = False, renderVector = True)
            return
        
        if UserSettings.Get(group = 'vdigit', key = 'checkForDupl',
                            subkey = 'enabled'):
            lines = self.digit.GetDisplay().GetSelected()
        else:
            lines = (self.digit.GetDisplay().GetSelected()[0],) # only first found
                        
        for line in lines:
            cats[line] = self.digit.GetLineCats(line)
        
        posWindow = self.ClientToScreen((self.mouse['end'][0] + self.dialogOffset,
                                         self.mouse['end'][1] + self.dialogOffset))
        
        if self.toolbar.GetAction() == "displayAttrs":
            # select attributes based on coordinates (all layers)
            if self.parent.dialogs['attributes'] is None:
                self.parent.dialogs['attributes'] = \
                    DisplayAttributesDialog(parent = self, map = mapLayer,
                                            cats = cats,
                                            action = "update")
            else:
                # upgrade dialog
                self.parent.dialogs['attributes'].UpdateDialog(cats = cats)
           
            if self.parent.dialogs['attributes'] and \
                    self.parent.dialogs['attributes'].mapDBInfo:
                if len(cats.keys()) > 0:
                    # highlight feature & re-draw map
                    if not self.parent.dialogs['attributes'].IsShown():
                        self.parent.dialogs['attributes'].Show()
                else:
                    if self.parent.dialogs['attributes'] and \
                            self.parent.dialogs['attributes'].IsShown():
                        self.parent.dialogs['attributes'].Hide()
        
        else: # displayCats
            if self.parent.dialogs['category'] is None:
                # open new dialog
                dlg = VDigitCategoryDialog(parent = self,
                                           vectorName = mapLayer,
                                           cats = cats,
                                           pos = posWindow,
                                           title = _("Update categories"))
                self.parent.dialogs['category'] = dlg
            else:
                # update currently open dialog
                self.parent.dialogs['category'].UpdateDialog(cats = cats)
                
            if self.parent.dialogs['category']:
                if len(cats.keys()) > 0:
                    # highlight feature & re-draw map
                    if not self.parent.dialogs['category'].IsShown():
                        self.parent.dialogs['category'].Show()
                else:
                    if self.parent.dialogs['category'].IsShown():
                        self.parent.dialogs['category'].Hide()
        
        self.UpdateMap(render = False, renderVector = True)
        
    def OnLeftDownCopyCA(self, event):
        """!Left mouse button pressed - vector digitizer copy
        categories or attributes action
        """
        if not hasattr(self, "copyCatsList"):
            self.copyCatsList = []
        else:
            self.copyCatsIds = []
            self.mouse['box'] = 'box'
        
    def OnLeftDownCopyLine(self, event):
        """!Left mouse button pressed - vector digitizer copy lines
        action
        """
        if not hasattr(self, "copyIds"):
            self.copyIds = []
            self.layerTmp = None
        
    def OnLeftDownBulkLine(self, event):
        """!Left mouse button pressed - vector digitizer label 3D
        vector lines
        """
        if len(self.polycoords) > 1: # start new line
            self.polycoords = []
            self.ClearLines(pdc = self.pdcTmp)
        self.polycoords.append(self.Pixel2Cell(event.GetPositionTuple()[:]))
        if len(self.polycoords) == 1:
            begin = self.Pixel2Cell(self.polycoords[-1])
            end   = self.Pixel2Cell(self.mouse['end'])
        else:
            end   = self.Pixel2Cell(self.polycoords[-1])
            begin = self.Pixel2Cell(self.mouse['begin'])
            
            self.DrawLines(self.pdcTmp, polycoords = (begin, end))
        
    def OnLeftDownUndo(self, event):
        """!Left mouse button pressed with control key - vector
        digitizer undo functionality
        """
        if self.mouse["use"] != "pointer" or not self.toolbar:
            return
        
        action = self.toolbar.GetAction()
        if (action == "addLine" and \
                self.toolbar.GetAction('type') in ["line", "boundary", "area"]) or \
                action == "editLine":
            # add line or boundary -> remove last point from the line
            try:
                removed = self.polycoords.pop()
                Debug.msg(4, "BufferedWindow.OnMiddleDown(): polycoords_poped=%s" % \
                              [removed,])
                # self.mouse['begin'] = self.Cell2Pixel(self.polycoords[-1])
            except:
                pass
            
        if action == "editLine":
            # remove last vertex & line
            if len(self.moveInfo['id']) > 1:
                self.moveInfo['id'].pop()
                
            self.UpdateMap(render = False, renderVector = False)
            
        elif action in ["deleteLine", "deleteArea", "moveLine", "splitLine",
                        "addVertex", "removeVertex", "moveVertex",
                        "copyCats", "flipLine", "mergeLine",
                        "snapLine", "connectLine", "copyLine",
                        "queryLine", "breakLine", "typeConv"]:
            # various tools -> unselected selected features
            self.digit.GetDisplay().SetSelected([])
            if action in ["moveLine", "moveVertex", "editLine"] and \
                    hasattr(self, "moveInfo"):
                del self.moveInfo
                
            elif action == "copyCats":
                try:
                    del self.copyCatsList
                    del self.copyCatsIds
                except AttributeError:
                    pass
                
            elif action == "copyLine":
                del self.copyIds
                if self.layerTmp:
                    self.Map.DeleteLayer(self.layerTmp)
                    self.UpdateMap(render = True, renderVector = False)
                del self.layerTmp

            self.polycoords = []
            self.UpdateMap(render = False) # render vector
        
        elif action == "zbulkLine":
            # reset polyline
            self.polycoords = []
            self.digit.GetDisplay().SetSelected([])
            self.UpdateMap(render = False)
        
        self.redrawAll = True
        self.UpdateMap(render = False, renderVector = False)

    def _onLeftDown(self, event):
        """!Left mouse button donw - vector digitizer various actions
        """
        try:
            mapLayer = self.toolbar.GetLayer().GetName()
        except:
            GMessage(parent = self,
                     message = _("No vector map selected for editing."))
            event.Skip()
            return
        
        action = self.toolbar.GetAction()
        
        if not action:
            GMessage(parent = self,
                     message = _("Nothing to do. "
                                 "Choose appropriate tool from digitizer toolbar."))
            event.Skip()
            return
        
        if action not in ("moveVertex",
                          "addVertex",
                          "removeVertex",
                          "editLine"):
            # set pen
            self.pen = wx.Pen(colour = UserSettings.Get(group = 'vdigit', key = 'symbol',
                                                        subkey = ['newSegment', 'color']),
                              width = 2, style = wx.SHORT_DASH)
            self.polypen = wx.Pen(colour = UserSettings.Get(group = 'vdigit', key = 'symbol',
                                                            subkey = ['newLine', 'color']),
                                  width = 2, style = wx.SOLID)
        
        if action in ("addVertex",
                      "removeVertex",
                      "splitLines"):
            # unselect
            self.digit.GetDisplay().SetSelected([])
        
        if action == "addLine":
            self.OnLeftDownAddLine(event)
        
        elif action == "editLine" and \
                hasattr(self, "moveInfo"):
            self.OnLeftDownEditLine(event)

        elif action in ("moveLine", "moveVertex", "editLine") and \
                not hasattr(self, "moveInfo"):
            self.OnLeftDownMoveLine(event)
        
        elif action in ("displayAttrs"
                        "displayCats"):
            self.OnLeftDownDisplayCA(event)
            
        elif action in ("copyCats",
                        "copyAttrs"):
            self.OnLeftDownCopyCA(event)
            
        elif action == "copyLine":
            self.OnLeftDownCopyLine(event)
            
        elif action == "zbulkLine":
            self.OnLeftDownBulkLine(event)
        
    def OnLeftUpVarious(self, event):
        """!Left mouse button released - vector digitizer various
        actions
        """
        pos1 = self.Pixel2Cell(self.mouse['begin'])
        pos2 = self.Pixel2Cell(self.mouse['end'])
        
        nselected = 0
        action = self.toolbar.GetAction()
        # -> delete line || move line || move vertex
        if action in ("moveVertex",
                      "editLine"):
            if len(self.digit.GetDisplay().GetSelected()) == 0:
                nselected = self.digit.GetDisplay().SelectLineByPoint(pos1)['point']
                
                if action == "editLine":
                    try:
                        selVertex = self.digit.GetDisplay().GetSelectedVertex(pos1)[0]
                    except IndexError:
                        selVertex = None
                        
                    if selVertex:
                        # self.UpdateMap(render=False)
                        ids = self.digit.GetDisplay().GetSelected(grassId = False)
                        # move this line to tmp layer
                        self.polycoords = []
                        for id in ids:
                            if id % 2: # register only vertices
                                e, n = self.Pixel2Cell(self.pdcVector.GetIdBounds(id)[0:2])
                                self.polycoords.append((e, n))
                        self.digit.GetDisplay().DrawSelected(False) 
                                
                        if selVertex < ids[-1] / 2:
                            # choose first or last node of line
                            self.moveInfo['id'].reverse()
                            self.polycoords.reverse()
                    else:
                        # unselect
                        self.digit.GetDisplay().SetSelected([])
                        del self.moveInfo
                
                    self.UpdateMap(render = False)
            
        elif action in ("copyCats",
                        "copyAttrs"):
            if not hasattr(self, "copyCatsIds"):
                # 'from' -> select by point
                nselected = self.digit.GetDisplay().SelectLineByPoint(pos1)['point']
                if nselected:
                    self.copyCatsList = self.digit.GetDisplay().GetSelected()
            else:
                # -> 'to' -> select by bbox
                self.digit.GetDisplay().SetSelected([])
                # return number of selected features (by box/point)
                nselected = self.digit.GetDisplay().SelectLinesByBox((pos1, pos2))
                if nselected == 0:
                    if self.digit.GetDisplay().SelectLineByPoint(pos1) is not None:
                        nselected = 1
                        
                if nselected > 0:
                    self.copyCatsIds = self.digit.GetDisplay().GetSelected()
        
        elif action == "queryLine":
            selected = self.digit.SelectLinesByQuery(bbox = (pos1, pos2))
            nselected = len(selected)
            if nselected > 0:
                self.digit.GetDisplay().SetSelected(selected)
        
        else:
            # -> moveLine || deleteLine, etc. (select by point/box)
            if action == 'moveLine' and \
                    len(self.digit.GetDisplay().GetSelected()) > 0:
                nselected = 0
            else:
                if action == 'moveLine':
                    drawSeg = True
                else:
                    drawSeg = False
                
                nselected = self.digit.GetDisplay().SelectLinesByBox(bbox = (pos1, pos2),
                                                                     drawSeg = drawSeg)
                if nselected == 0:
                    if self.digit.GetDisplay().SelectLineByPoint(pos1) is not None:
                        nselected = 1
        
        if nselected > 0:
            if action in ("moveLine", "moveVertex") and \
                    hasattr(self, "moveInfo"):
                # get pseudoDC id of objects which should be redrawn
                if action == "moveLine":
                    # -> move line
                    self.moveInfo['id'] = self.digit.GetDisplay().GetSelected(grassId = False)
                else: # moveVertex
                    self.moveInfo['id'] = self.digit.GetDisplay().GetSelectedVertex(pos1)
                    if len(self.moveInfo['id']) == 0: # no vertex found
                        self.digit.GetDisplay().SetSelected([])
            
            #
            # check for duplicates
            #
            if UserSettings.Get(group = 'vdigit', key = 'checkForDupl', subkey = 'enabled'):
                dupl = self.digit.GetDisplay().GetDuplicates()
                self.UpdateMap(render = False)
                    
                if dupl:
                    posWindow = self.ClientToScreen((self.mouse['end'][0] + self.dialogOffset,
                                                     self.mouse['end'][1] + self.dialogOffset))
                    
                    dlg = VDigitDuplicatesDialog(parent = self, data = dupl, pos = posWindow)
                    
                    if dlg.ShowModal() == wx.ID_OK:
                        self.digit.GetDisplay().UnSelect(dlg.GetUnSelected())
                        # update selected
                        self.UpdateMap(render = False)
                
            if action != "editLine":
                # -> move line || move vertex
                self.UpdateMap(render = False)
        
        else: # no vector object found
            if not (action in ("moveLine",
                                                 "moveVertex") and \
                        hasattr(self, "moveInfo") and \
                        len(self.moveInfo['id']) > 0):
                # avoid left-click when features are already selected
                self.UpdateMap(render = False, renderVector = False)
        
    def OnLeftUpModifyLine(self, event):
        """!Left mouse button released - vector digitizer split line,
        add/remove vertex action
        """
        pos1 = self.Pixel2Cell(self.mouse['begin'])
        
        pointOnLine = self.digit.GetDisplay().SelectLineByPoint(pos1)['point']
        if not pointOnLine:
            return
        
        if self.toolbar.GetAction() in ["splitLine", "addVertex"]:
            self.UpdateMap(render = False) # highlight object
            self.DrawCross(pdc = self.pdcTmp, coords = self.Cell2Pixel((pointOnLine[0], pointOnLine[1])),
                           size = 5)
        else: # removeVertex
            # get only id of vertex
            try:
                id = self.digit.GetDisplay().GetSelectedVertex(pos1)[0]
            except IndexError:
                id = None
            
            if id:
                x, y = self.pdcVector.GetIdBounds(id)[0:2]
                self.pdcVector.RemoveId(id)
                self.UpdateMap(render = False) # highlight object
                self.DrawCross(pdc = self.pdcTmp, coords = (x, y),
                               size = 5)
            else:
                # unselect
                self.digit.GetDisplay().SetSelected([])
                self.UpdateMap(render = False)
        
    def OnLeftUpCopyLine(self, event):
        """!Left mouse button released - vector digitizer copy feature
        action
        """
        pos1 = self.Pixel2Cell(self.mouse['begin'])
        pos2 = self.Pixel2Cell(self.mouse['end'])
        
        if UserSettings.Get(group = 'vdigit', key = 'bgmap',
                            subkey = 'value', internal = True) == '':
            # no background map -> copy from current vector map layer
            nselected = self.bdigit.GetDisplay().SelectLinesByBox((pos1, pos2))
            
            if nselected > 0:
                # highlight selected features
                self.UpdateMap(render = False)
            else:
                self.UpdateMap(render = False, renderVector = False)
        else:
            # copy features from background map
            self.copyIds = self.digit.SelectLinesFromBackgroundMap(bbox = (pos1, pos2))
            if len(self.copyIds) > 0:
                color = UserSettings.Get(group = 'vdigit', key = 'symbol',
                                         subkey = ['highlight', 'color'])
                colorStr = str(color[0]) + ":" + str(color[1]) + ":" + str(color[2])
                dVectTmp = ['d.vect',
                            'map=%s' % UserSettings.Get(group = 'vdigit', key = 'bgmap',
                                                        subkey = 'value', internal = True),
                            'cats=%s' % ListOfCatsToRange(self.copyIds),
                            '-i',
                            'color=%s' % colorStr,
                            'fcolor=%s' % colorStr,
                            'type=point,line,boundary,centroid',
                            'width=2']
                
                if not self.layerTmp:
                    self.layerTmp = self.Map.AddLayer(ltype = 'vector',
                                                      name = QUERYLAYER,
                                                      command = dVectTmp)
                else:
                    self.layerTmp.SetCmd(dVectTmp)
            else:
                if self.layerTmp:
                    self.Map.DeleteLayer(self.layerTmp)
                    self.layerTmp = None
            
            self.UpdateMap(render = True, renderVector = True)
            
    def OnLeftUpBulkLine(self, event):
        """!Left mouse button released - vector digitizer z-bulk line
        action
        """
        # select lines to be labeled
        pos1 = self.polycoords[0]
        pos2 = self.polycoords[1]
        nselected = self.digit.GetDisplay().SelectLinesByBox((pos1, pos2))
        
        if nselected > 0:
            # highlight selected features
            self.UpdateMap(render = False)
            self.DrawLines(pdc = self.pdcTmp) # redraw temp line
        else:
            self.UpdateMap(render = False, renderVector = False)
            
    def OnLeftUpConnectLine(self, event):
        """!Left mouse button released - vector digitizer connect line
        action
        """
        if len(self.digit.GetDisplay().GetSelected()) > 0:
            self.UpdateMap(render = False)
        
    def _onLeftUp(self, event):
        """!Left mouse button released"""
        if hasattr(self, "moveInfo"):
            if len(self.digit.GetDisplay().GetSelected()) == 0:
                self.moveInfo['begin'] = self.Pixel2Cell(self.mouse['begin']) # left down
            
            # eliminate initial mouse moving efect
            self.mouse['begin'] = self.mouse['end'] 
        
        action = self.toolbar.GetAction()
        if action in ("deleteLine",
                      "deleteArea",
                      "moveLine",
                      "moveVertex",
                      "copyCats",
                      "copyAttrs",
                      "editLine",
                      "flipLine",
                      "mergeLine",
                      "snapLine",
                      "queryLine",
                      "breakLine",
                      "typeConv",
                      "connectLine"):
            self.OnLeftUpVarious(event)
        
        elif action in ("splitLine",
                        "addVertex",
                        "removeVertex"):
            self.OnLeftUpModifyLine(event)
        
        elif action == "copyLine":
            self.OnLeftUpCopyLine(event)
            
        elif action == "zbulkLine" and \
                len(self.polycoords) == 2:
            self.OnLeftUpBulkLine(event)
        
        elif action == "connectLine":
            self.OnLeftUpConnectLine(event)
        
        if len(self.digit.GetDisplay().GetSelected()) > 0:
            self.redrawAll = None
        
    def _onRightDown(self, event):
        # digitization tool (confirm action)
        action = self.toolbar.GetAction()
        if action in ("moveLine", "moveVertex") and \
                hasattr(self, "moveInfo"):
            pFrom = self.moveInfo['begin']
            pTo = self.Pixel2Cell(event.GetPositionTuple())
            
            move = (pTo[0] - pFrom[0],
                    pTo[1] - pFrom[1])
            
            if action == "moveLine":
                # move line
                if self.digit.MoveSelectedLines(move) < 0:
                    return
            elif action == "moveVertex":
                # move vertex
                fid = self.digit.MoveSelectedVertex(pFrom, move)
                if fid < 0:
                    return
                
                self._geomAttrbUpdate([fid,])
            
            del self.moveInfo
        
    def _onRightUp(self, event):
        """!Right mouse button released (confirm action)
        """
        action = self.toolbar.GetAction()
        if action == "addLine" and \
                self.toolbar.GetAction('type') in ["line", "boundary", "area"]:
            # -> add new line / boundary
            try:
                mapName = self.toolbar.GetLayer().GetName()
            except:
                mapName = None
                GError(parent = self,
                       message = _("No vector map selected for editing."))
                    
            if mapName:
                if self.toolbar.GetAction('type') == 'line':
                    line = True
                else:
                    line = False
                    
                if len(self.polycoords) < 2: # ignore 'one-point' lines
                    return
                    
                nfeat, fids = self.digit.AddFeature(self.toolbar.GetAction('type'), self.polycoords)
                if nfeat < 0:
                    return
                    
                position = self.Cell2Pixel(self.polycoords[-1])
                self.polycoords = []
                self.UpdateMap(render = False)
                self.redrawAll = True
                self.Refresh()
                
                # add new record into atribute table
                if self._addRecord() and (line is True or (not line and nfeat > 0)):
                    posWindow = self.ClientToScreen((position[0] + self.dialogOffset,
                                                     position[1] + self.dialogOffset))
                        
                    # select attributes based on layer and category
                    cats = { fids[0] : {
                            UserSettings.Get(group = 'vdigit', key = "layer", subkey = 'value') :
                                (UserSettings.Get(group = 'vdigit', key = "category", subkey = 'value'), )
                            }}
                    
                    addRecordDlg = DisplayAttributesDialog(parent = self, map = mapName,
                                                           cats = cats,
                                                           pos = posWindow,
                                                           action = "add", ignoreError = True)
                    
                    for fid in fids:
                        self._geomAttrb(fid, addRecordDlg, 'length')
                        # auto-placing centroid
                        self._geomAttrb(fid, addRecordDlg, 'area')
                        self._geomAttrb(fid, addRecordDlg, 'perimeter')

                    
                    if addRecordDlg.mapDBInfo and \
                            addRecordDlg.ShowModal() == wx.ID_OK:
                        sqlfile = tempfile.NamedTemporaryFile(mode = "w")
                        for sql in addRecordDlg.GetSQLString():
                            sqlfile.file.write(sql + ";\n")
                        sqlfile.file.flush()
                        RunCommand('db.execute',
                                   parent = True,
                                   quiet = True,
                                   input = sqlfile.name)
                        
                    if addRecordDlg.mapDBInfo:
                        self._updateATM()
            
        elif action == "deleteLine":
            # -> delete selected vector features
            if self.digit.DeleteSelectedLines() < 0:
                return
            self._updateATM()
        elif action == "deleteArea":
            # -> delete selected vector areas
            if self.digit.DeleteSelectedAreas() < 0:
                return
            self._updateATM()
        elif action == "splitLine":
            # split line
            if self.digit.SplitLine(self.Pixel2Cell(self.mouse['begin'])) < 0:
                return
        elif action == "addVertex":
            # add vertex
            fid = self.digit.AddVertex(self.Pixel2Cell(self.mouse['begin']))
            if fid < 0:
                return
        elif action == "removeVertex":
            # remove vertex
            fid = self.digit.RemoveVertex(self.Pixel2Cell(self.mouse['begin']))
            if fid < 0:
                return
            self._geomAttrbUpdate([fid,])
        elif action in ("copyCats", "copyAttrs"):
            if action == 'copyCats':
                if self.digit.CopyCats(self.copyCatsList,
                                       self.copyCatsIds, copyAttrb = False) < 0:
                    return
            else:
                if self.digit.CopyCats(self.copyCatsList,
                                       self.copyCatsIds, copyAttrb = True) < 0:
                    return
                
            del self.copyCatsList
            del self.copyCatsIds
            
            self._updateATM()
                
        elif action == "editLine" and \
                hasattr(self, "moveInfo"):
            line = self.digit.GetDisplay().GetSelected()[0]
            if self.digit.EditLine(line, self.polycoords) < 0:
                return
                
            del self.moveInfo
                
        elif action == "flipLine":
            if self.digit.FlipLine() < 0:
                return
        elif action == "mergeLine":
            if self.digit.MergeLine() < 0:
                return
        elif action == "breakLine":
            if self.digit.BreakLine() < 0:
                return
        elif action == "snapLine":
            if self.digit.SnapLine() < 0:
                return
        elif action == "connectLine":
            if len(self.digit.GetDisplay().GetSelected()) > 1:
                if self.digit.ConnectLine() < 0:
                    return
        elif action == "copyLine":
            if self.digit.CopyLine(self.copyIds) < 0:
                return
            del self.copyIds
            if self.layerTmp:
                self.Map.DeleteLayer(self.layerTmp)
                self.UpdateMap(render = True, renderVector = False)
            del self.layerTmp
        
        elif action == "zbulkLine" and len(self.polycoords) == 2:
            pos1 = self.polycoords[0]
            pos2 = self.polycoords[1]
            
            selected = self.digit.GetDisplay().GetSelected()
            dlg = VDigitZBulkDialog(parent = self, title = _("Z bulk-labeling dialog"),
                                    nselected = len(selected))
            if dlg.ShowModal() == wx.ID_OK:
                if self.digit.ZBulkLines(pos1, pos2, dlg.value.GetValue(),
                                         dlg.step.GetValue()) < 0:
                    return
            self.UpdateMap(render = False)
        elif action == "typeConv":
            # -> feature type conversion
            # - point <-> centroid
            # - line <-> boundary
            if self.digit.TypeConvForSelectedLines() < 0:
                return

        if action != "addLine":
            # unselect and re-render
            self.digit.GetDisplay().SetSelected([])
            self.polycoords = []
            self.UpdateMap(render = False)
        
    def _onMouseMoving(self, event):
        self.mouse['end'] = event.GetPositionTuple()[:]
        
        Debug.msg (5, "BufferedWindow.OnMouseMoving(): coords=%f,%f" % \
                       (self.mouse['end'][0], self.mouse['end'][1]))

        action = self.toolbar.GetAction()
        if action == "addLine" and \
                self.toolbar.GetAction('type') in ["line", "boundary", "area"]:
            if len(self.polycoords) > 0:
                self.MouseDraw(pdc = self.pdcTmp, begin = self.Cell2Pixel(self.polycoords[-1]))
        
        elif action in ["moveLine", "moveVertex", "editLine"] \
                and hasattr(self, "moveInfo"):
            dx = self.mouse['end'][0] - self.mouse['begin'][0]
            dy = self.mouse['end'][1] - self.mouse['begin'][1]
        
            # draw lines on new position
            if action == "moveLine" and \
                    len(self.moveInfo['id']) > 0:
                # move line
                for id in self.moveInfo['id']:
                    self.pdcTmp.TranslateId(id, dx, dy)
            elif action in ["moveVertex", "editLine"]:
                # move vertex ->
                # (vertex, left vertex, left line,
                # right vertex, right line)
                
                # do not draw static lines
                if action == "moveVertex" and \
                        len(self.moveInfo['id']) > 0:
                    self.polycoords = []
                    self.pdcTmp.RemoveId(self.moveInfo['id'][0])
                    if self.moveInfo['id'][1] > 0: # previous vertex
                        x, y = self.Pixel2Cell(self.pdcTmp.GetIdBounds(self.moveInfo['id'][1])[0:2])
                        self.pdcTmp.RemoveId(self.moveInfo['id'][1] + 1)
                        self.polycoords.append((x, y))
                    self.polycoords.append(self.Pixel2Cell(self.mouse['end']))

                    if self.moveInfo['id'][2] > 0: # next vertex
                        x, y = self.Pixel2Cell(self.pdcTmp.GetIdBounds(self.moveInfo['id'][2])[0:2])
                        self.pdcTmp.RemoveId(self.moveInfo['id'][2]-1)
                        self.polycoords.append((x, y))
                    
                    self.ClearLines(pdc = self.pdcTmp)
                    self.DrawLines(pdc = self.pdcTmp)
                        
                if action == "editLine":
                    self.MouseDraw(pdc = self.pdcTmp,
                                   begin = self.Cell2Pixel(self.polycoords[-1]))
                
            self.Refresh() # TODO: use RefreshRect()
            self.mouse['begin'] = self.mouse['end']
            
        elif action == "zbulkLine":
            if len(self.polycoords) == 1:
                # draw mouse moving
                self.MouseDraw(self.pdcTmp)
                
    def _zoom(self, event):
        tmp1 = self.mouse['end']
        tmp2 = self.Cell2Pixel(self.moveInfo['begin'])
        dx = tmp1[0] - tmp2[0]
        dy = tmp1[1] - tmp2[1]
        self.moveInfo['beginDiff'] = (dx, dy)
        for id in self.moveInfo['id']:
            self.pdcTmp.RemoveId(id)
        
    def _addRecord(self):
        return UserSettings.Get(group = 'vdigit', key = "addRecord", subkey = 'enabled')